WO2023213910A1 - Rodent control by alternate olfactory simulation - Google Patents

Abstract

The present invention relates to a pheromonal composition comprising: (a) 6.0% to 12.0% by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate; or 6.0% to 12.0% by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate and ethyl linoleate; (b) 100 ppm to 5000 ppm, relative to the total weight of the composition, of a component (b) selected from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 (C₁-C₆)alkyl groups, and mixtures thereof; or 0.001 ppm to 50 ppm, relative to the total weight of the composition, of a component (b) selected from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butylthiazoline; and (c) one or more solvents, particularly selected from water, ethanol, isopropanol, and mixtures thereof. It also relates to an article impregnated with such a composition and to a process for its preparation, and to the use of such a composition or an article impregnated with such a composition for controlling rodents.

Description

DESCRIPTION

TITLE: Rodent control by alternating olfactory simulation

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a pheromonal composition comprising a pheromone (a) chosen from fatty acids, non-cyclic aliphatic diacids, ethyl or methyl esters of fatty acids, ethyl and/or methyl esters of non-cyclic aliphatic diacids, and mixtures thereof. ; and a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, 2-propylthietane, 2,5-dihydro-2,4,5- trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof.

It also relates to an article impregnated with such a composition and its preparation process, as well as the use of such a composition or an article impregnated with such a composition to combat rodents. It relates in particular to a method of combating rodents using an alternating diffusion of pheromones (mixtures of pheromone (a) and component (b)) of different predators of rodents such as felines, canids, snakes, or mustelids. , making it possible to create an alternating olfactory simulation (SOA) of the presence of these predators which keeps rodents away from the space or objects to be protected.

It also relates to a kit usable in such a method of combating rodents by SOA, such a kit comprising at least two pheromonal compositions according to the invention comprising pheromonal mixtures (consisting of the pheromone (a) and component (b)) different or several impregnated articles, at least of which articles are impregnated with pheromonal compositions according to the invention comprising different pheromonal mixtures.

STATE OF THE ART

Rodents are a nuisance in many aspects, both economic and health. They can damage electrical installations, thermal insulation in buildings and can damage foodstuffs stored both in silos and in their various packaging. In addition to this economic damage, rodents also carry diseases transmissible to other animals but also to humans such as salmonellosis, leptospirosis, borreliosis, typhus, encephalitis, meningitis, choriomeningitis, hantavirus , the Erve virus, THAV as cited in FR2962006A1.

The fight against rodents is an exercise that man has always been involved in. The techniques used constitute the arsenal of rodent control which is an important economic activity in all countries and in all human activities. It can target the protection of living or storage spaces such as the protection of fields ravaged by mole rats. However, the techniques used to date suffer from various problems.

Probably the two most popular techniques are the use of poison bait and trapping.

Poisoned baits (see for example FR2839421A1) with anticoagulants firstly pose health and ecological problems. Indeed, when a rodent eats a poisoned bait, it generally dies later in a place that is not necessarily visible, which can cause harm linked to the decomposition of the body. Furthermore, a poisoned rat can itself be devoured by a predator, bird or mammal, wild or domestic, which in turn can die from poisoning. This technique can therefore have a harmful effect on biodiversity: it has also been observed during rodent control campaigns in meadows, a scarcity of birds of prey such as buzzards or owls (Michael Coeurdassier, et al. Fourrages, 2014 , 327-335).

Trapping (lethal or not) makes it possible to address these two problems since the body of the trapped rodent can be destroyed. Thus, traps or sound or food repellents have been developed to combat rats (see for example: USD768806, W02010/106352, EP1691602, US10212928, US10143193, US2021/0360899).

However, these traps have a limited effect because their capacity is generally limited to one rodent per trap and unless the trap is set regularly or used in large numbers, this solution cannot counter an invasion of rats or mice in a hangar for example.

Another phenomenon makes these techniques difficult to sustain: the learning capacity of rodent populations which renders a control system in an area obsolete after a certain time. Indeed, it is known that rats can learn to avoid a bait or a trap thanks to the first trapped individuals which transmit sound or olfactory information to their conspecifics (Lee, H. and Kim, J. J. J. Neurosci. 1998, 18(20) , 8444-8454).

Finally, the repellent substances used are often toxic to humans and/or the environment and therefore of limited use (US2011/0008264).

It is therefore of significant economic interest to be able to develop more effective, sustainable and environmentally friendly rodent control techniques.

Surprisingly, the applicant has demonstrated that it is possible to effectively combat rodents using mixtures of pheromones such as territorial marking pheromones of indigenous predators of rodents and alarm pheromones of rodents (rats, mice). and by alternating these mixtures over time to avoid any phenomenon of habituation and learning. This combination of the two types of pheromones allows effective and prolonged action over time, using in addition to lower quantities of pheromones, thus limiting or avoiding their potential toxic impact.

Several classes of components of territorial marking pheromones have been identified in the literature. These components can be classified into 4 main families.

Family I includes heavy, low volatile fatty acids and their esters. More specifically, this family includes the territorial pheromones of rodent predators composed of precise mixtures of fatty acids or their esters. These mixtures are specific to each species or subspecies. These compounds are generally present on the hairs of predators, such as feline facial pheromones, and can be used for territorial marking by rubbing against a medium. Thus, pheromones are generally identified by analyzing mixtures of fatty substances present on animal hair. These mixtures are low volatile and have a long territory marking capacity. It is considered that these pheromones make it possible to identify a living space of the predator in question such as a burrow, a den or any other habitat. Such pheromones are described in particular in EP0724832; Soini, H.A. et al. Journal of Chemical Ecology 2012, 38(2), 145-156; Van den Berghe, F. et al. Plos One 2019, 14(3), e0212551; Arnould, C. et al. Journal of Chemical Ecology 1998, 24(3), 559-576.

Family II includes amino derivatives such as 2-phenylethylamine, or even pyrazines such as 2,5-dimethylpyrazine, 2,6-dimethyl pyrazine, 2,3,5-trimethyl pyrazine, 3-ethyl- 2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3-dimethyl-5-ethyl pyrazine. These compounds are generally present in the feces of predators such as foxes, big cats, mustelids. Such pheromones are described in particular in Villalobos, A. et al. Pest. Manag. Sci. 2022, 78, 1677. Although pyrazines have been described as inducing fear-associated behaviors in mice (Osada et al., Journal of Chemical Ecology 2017, 43(3), 263-272), this activity is limited in time because these compounds are volatile. As an example, diethylpyrazines have boiling points of around 190°C at atmospheric pressure, therefore their effect may not be long-lasting. In addition, these compounds must often be used at high concentrations to be effective, which limits their use due to their toxicity (WO 2014/133156A1). Some molecules in this family, such as 2-phenylethylamine, have been used in rodent control methods. However, to the Applicant's knowledge, they have never been described in synergy with another pheromone. Family III includes sulfur derivatives such as 2-propylthietane. These are, for example, molecules secreted by the anal glands of various species such as ferrets, martens, martens, or skunks. Such pheromones are described in particular in Clapperton, BK et al. Animal Behavior 1998, 36(2), 541 -553. Family IV includes a single compound, namely 2,5-dihydro-2,4,5-trimethylthiazoline (TMT), a substance present in fox feces and which has the particularity of being very close to alarm pheromones. mice such as 2-sec-butyl-4,5-dihydrothiazoline (SBT). It also includes the characteristics of family II and family III. It is described in Brechbühl J. et al. Proc. Natl. Acad. Sci. USA 2013, 110(12), 4762; Vernet-Maury E. et al. J.Chem. School. 1984, 10(7), 1007-1018; Wallace KJ and Rosen JB Behav. Neuroscience. 2000, 114(5), 912-922; Kobayakawa K. et al. Nature 2007, 450, 503-508.

The modes of action of these odors on the brain of mice are quite specific: the substances coming from the anal glands or present in the urine or feces of predators (families II, III and IV) are often associated with a hunting ground of the predator generally very large. On the contrary, the pheromones present on the hairs of predators such as facial pheromones (family I) are, for their part, linked to living territories (den, litter box, living room for cats for example). However, rodents do not have as intense a fear reaction in the presence of hunting territory odors as in the presence of the body odors of the predator (Clapperton, B. K., Elaine C. M., and Hussam A. R. “Mammalian Pheromones - new Opportunities for Improved Predator Control in New Zealand. Publishing Team, Department of Conservation, 2017). This phenomenon results from an intuitive appreciation of the reality of the risk: the hunting territory of a predator is not constantly inhabited and rodents understand that these odors, when they are in decline, do not indicate an immediate danger. On the contrary, body pheromones deposited by smears, which are quite fleeting, imply a nearby danger.

In addition, rodent alarm pheromones help condition other individuals of the species to a situation or stimulus associated with imminent danger (Carew, S. J. et al. Scientific reports 2018, 8(1), 1 -10 ).

US9918472 describes the use of particular 3 to 7-membered heterocycles with a structure close to TMT (2,5-dihydro-2,4,5-trimethylthiazoline) as repellents of animals such as rodents. However, the molecules identified do not correspond to odors of rodent predators, alone or in mixture.

SUMMARY OF THE INVENTION

The applicant has thus discovered new formulations combining predator pheromones and their use in the fight against rodents. These combinations have the effect not only of repelling rodents over time but also of avoiding an habituation effect, which is surprising.

The subject of the present invention is therefore a pheromonal composition, more particularly intended to repel rodents, comprising: (a) a pheromone (a) chosen from fatty acids, non-cyclic aliphatic diacids, ethyl or methyl esters of fatty acids, ethyl and/or methyl esters of non-cyclic aliphatic diacids, and mixtures thereof; And

(b) a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups (for example 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine), 2-propylthietane, 2,5-dihydro -2,4,5- trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof. Preferably, the pheromonal composition comprises:

(a) 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, acid capric acid, lauric acid, ethyl palmitate and ethyl oleate; Or

6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate;

(b) 100 ppm to 5000 ppm, in particular 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and mixtures thereof; Or

0.001 ppm to 50 ppm, in particular 0.005 ppm to 10 ppm, more particularly 0.05 ppm to 5 ppm, for example approximately 1 ppm, relative to the total weight of the composition, of a component

(b) chosen from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline; And

(c) optionally one or more solvents.

Such a composition for the fight against rodents therefore combines different types of territorial marking pheromones (habitat and/or hunting) of rodent predators such as felines, canids, snakes, or even mustelids or combines a or several territorial marking pheromones of rodent predators with a rodent alarm pheromone. These compositions in the form of a mixture of pheromones make it possible to touch different areas of the brain of rodents, which may explain why the rodents do not get used to these odors which therefore retain a permanent repellent effect.

The present invention also relates to an article impregnated with a composition according to the invention. Such an impregnated article can be prepared by a preparation process, object of the present invention, comprising the impregnation of the article with a composition according to the invention, and more particularly a composition according to the invention comprising one or more solvents, namely a composition comprising the pheromone (a), the component (b) and one or more solvents.

The present invention also relates to the use of a composition according to the invention or of an article impregnated according to the invention, to combat rodents.

In fact, the pheromonal mixture included in these compositions or these impregnated articles acts as a repellent to rodents. It simulates the presence of a network of traces of rodent predators by the use of territorial marking pheromones (habitat and/or hunting) of said predators and/or rodent alarm pheromones. Such use is therefore not lethal for rodents and presents no toxicity to humans or the environment.

The present invention also relates to a method of combating rodents comprising:

(1) the application of a composition Ci according to the invention or the deposit of an article impregnated with a composition Ci according to the invention in a space or on an object to be protected against rodents; And

(2) optionally repeating step (1) one or more times, within 1 to 90 days, preferably 7 to 35 days, after the previous step.

Advantageously, step (2) is implemented and comprises N-1 reiteration(s) each carried out independently with a composition Ci according to the invention or an article impregnated with a composition Cj according to the invention, the compositions Ci to CN being different from each other, that is to say that the pheromonal mixture constituted by the pheromone (a) and component (b) is different from one composition to another.

By using different pheromonal mixtures, it is possible to alternately simulate the presence of different types of rodent predators, such as felines (e.g. cat), canids (e.g. dog, fox or wolf), snakes, or mustelids. . Territory marking pheromones can also be combined with a rodent alarm pheromone (pheromone released by a rodent when attacked by a predator) to reinforce the stress message. This method by Alternating Olfactory Simulation (SOA) of the presence of predators makes it possible to avoid any phenomenon of habituation and learning of rodents, allowing the effectiveness of the method to be maintained over time.

Such an SOA method can be implemented using a kit, object of the present invention, comprising: - at least two compositions according to the invention, the pheromonal mixture consisting of the pheromone (a) and component (b) of each of the compositions being different from one composition to another, or

- several articles impregnated according to the invention, at least two articles being impregnated with a pheromonal mixture, consisting of the pheromone (a) and component (b), different from one article to another.

The use of the compositions according to the invention in an SOA method reinforces the durable nature of the formulations by alternately simulating the presence of different rodent predators in a space to be protected.

DETAILED DESCRIPTION OF THE INVENTION

The subject of the present invention is therefore a pheromonal composition comprising:

(a) a pheromone (a) chosen from fatty acids, non-cyclic aliphatic diacids, ethyl or methyl esters of fatty acids, ethyl and/or methyl esters of non-cyclic aliphatic diacids, and mixtures thereof; And

(b) a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups (for example 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, there

2.3.5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine), 2-propylthietane, 2,5-dihydro-2, 4,5-trimethylthiazoline,

4.5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof.

Preferably, the pheromonal composition comprises:

(a) 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, acid capric acid, lauric acid, ethyl palmitate and ethyl oleate; Or

6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate;

(b) 100 ppm to 5000 ppm, in particular 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and mixtures thereof; Or

0.001 ppm to 50 ppm, in particular 0.005 ppm to 10 ppm, more particularly 0.05 ppm to 5 ppm, for example approximately 1 ppm, relative to the total weight of the composition, of a component (b) chosen from 2 -propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro- 2-sec-butyl-thiazoline; And

(c) optionally one or more solvents.

The pheromone (a) aims to simulate a territorial habitat marking pheromone of a predator of a rodent, namely a substance secreted by such a predator to mark its habitat territory.

By “rodent” we mean in particular a rat or a mouse.

By “predator” of a rodent, we mean in particular a feline (e.g. cat), a canid (e.g. dog, fox, wolf), a snake or even a mustelid (e.g. marten, ferret, mink).

Depending on the composition of the pheromone (a), it will be possible to simulate the presence of different predators.

By “fatty acids” is meant, for the purposes of the present invention, a carboxylic acid of formula R1 -COOH in which R1 represents a saturated or unsaturated hydrocarbon chain, linear or branched, preferably linear, the carboxylic acid comprising 4 to 22, in particular from 6 to 22, preferably from 8 to 20, and more preferably from 10 to 18, carbon atoms (including the carbon atom of the COOH function). When the hydrocarbon chain is unsaturated, it preferably comprises 1, 2 or 3 C=C double bonds. This may in particular be capric acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, oleic acid, or linoleic acid.

Thus, the fatty acid will advantageously be chosen from capric acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, oleic acid, linoleic acid, and mixtures thereof.

By “non-cyclic aliphatic diacid” is meant, for the purposes of the present invention, a dicarboxylic acid of formula HOOC-R2-COOH in which R2 represents a saturated or unsaturated hydrocarbon chain, linear or branched, preferably linear, the dicarboxylic acid comprising from 4 to 16, in particular from 6 to 14, preferably from 6 to 12, and even more preferably from 6 to 10, carbon atoms (including the 2 carbon atoms of the 2 COOH functions). When the hydrocarbon chain is unsaturated, it preferably comprises 1, 2 or 3 C=C double bonds. The hydrocarbon chain will advantageously be saturated. It may in particular be azelaic acid, or pimelic acid.

Thus, the non-cyclic aliphatic diacid will advantageously be chosen from azelaic acid, pimelic acid, and mixtures thereof.

According to a particular embodiment, the pheromone (a) comprises capric acid, methyl caprate, ethyl caprate, lauric acid, methyl laurate, ethyl laurate, myristic acid, methyl myristate, ethyl myristate, palmitic acid, methyl palmitate, ethyl palmitate, or a mixture thereof. According to another particular embodiment, the pheromone (a) comprises azelaic acid, dimethyl azelate, diethyl azelate, methyl and ethyl azelate, pimelic acid , dimethyl pimelate, diethyl pimelate, methyl ethyl pimelate, or a mixture thereof.

According to yet another particular embodiment, the pheromone (a) comprises:

- capric acid, methyl caprate, ethyl caprate, lauric acid, methyl laurate, ethyl laurate, myristic acid, methyl myristate, methyl myristate ethyl, palmitic acid, methyl palmitate, ethyl palmitate, or a mixture thereof, and

- azelaic acid, dimethyl azelate, diethyl azelate, methyl and ethyl azelate, pimelic acid, dimethyl pimelate, diethyl pimelate, pimelate methyl and ethyl, or a mixture thereof.

Advantageously, the pheromone (a) comprises at least one fatty acid or a non-cyclic aliphatic diacid, that is to say it comprises at least one component which is in its acid form. Indeed, this makes it possible to avoid causing unpleasant odors for humans since this acid will be able to neutralize the nitrogen function present on component (b) and therefore help to limit the perception by humans of its unpleasant odor. This also makes it possible to increase the persistence of the rodent-repellent effect of the composition according to the invention.

According to a particular embodiment, the pheromone (a) comprises, in particular is constituted by, a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0.1:0.5:3:5 by weight. Such a mixture simulates a cat's territorial marking pheromone.

According to another particular embodiment, the pheromone (a) comprises, in particular is constituted by, a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate, preferably in proportions of approximately 1:2:8:6:20:20:20 by weight. Such a mixture simulates a dog or wolf territorial marking pheromone.

The pheromone (a) will advantageously be present in the composition at a content of 1% to 20%, in particular 2% to 15%, preferably 6% to 12%, by weight, relative to the total weight of the composition.

Component (b) aims to simulate a territorial hunting marking pheromone (e.g. urine marking) of feline (eg cat) or canine (eg dog, fox, wolf) or a rodent alarm pheromone. The pyrazines substituted by 1, 2, 3 or 4 (Ci-Cô)alkyl groups (eg methyl or ethyl) are advantageously chosen from 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethyl pyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine, and mixtures thereof.

By “(Ci-Cô)alkyl” is meant, within the meaning of the present invention, a saturated hydrocarbon chain, linear or branched, comprising 1 to 6, in particular 1 to 4, preferably 1 to 2, carbon atoms. This will in particular be a methyl or ethyl group.

According to a particular embodiment, component (b) is chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and their mixtures. It simulates a feline (e.g. cat) or canine (e.g. wolf) urine marking pheromone.

According to another particular embodiment, component (b) is chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline , and mixtures thereof, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof. It simulates a ferret or fox hunting territory marking pheromone and/or a mouse alarm pheromone.

Each of these embodiments could be associated for example with a pheromone (a) constituted by:

- a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0 ,1:0, 5:3:5, or

- a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate , preferably in proportions of approximately 1:2:8:6:20:20:20 by weight.

Component (b) will advantageously be present in the composition at a content of 0.001 ppm to 5000 ppm, preferably 0.01 ppm to 2000 ppm.

When component (b) is chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and mixtures thereof, component (b) is advantageously present in the composition at a content of 100 ppm to 5000 ppm, in particular from 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition.

When component (b) is chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof, preferably among 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof, component (b) is advantageously present in the composition at a content of 0.001 ppm to 50 ppm, in particular from 0.005 ppm to 10 ppm, more particularly from 0.05 ppm to 5 ppm, for example about 1 ppm, relative to the total weight of the composition. The composition according to the invention may also comprise one or more solvents, advantageously chosen from water, methanol, ethanol, n-propanol, isopropanol, glycerol, 1,2-propanediol, 1, 3-propanediol, and mixtures thereof; in particular chosen from water, ethanol, isopropanol, and mixtures thereof.

The solvent(s) will advantageously be present in the composition at a content of 70% to 98%, for example from 80% to 95%, in particular from 85% to 95%, in particular from 87% to 93%, by weight, per relative to the total weight of the composition.

Such a composition comprising one or more solvents is advantageously liquid, making it easier to apply.

According to a particular embodiment, the composition according to the invention comprises:

(a) 1% to 20%, in particular 2% to 15%, preferably 6% to 12%, by weight, relative to the total weight of the composition, of the pheromone (a) as defined above;

(b) 0.001 ppm to 5000 ppm, preferably 0.01 ppm to 2000 ppm, relative to the total weight of the composition, of component (b) as defined above; And

(c) optionally one or more solvents, advantageously chosen from water, methanol, ethanol, n-propanol, isopropanol, glycerol, 1,2-propanediol, 1,3-propanediol, and their mixtures, in particular chosen from water, ethanol, isopropanol, and their mixtures, in particular at a content by weight, relative to the total weight of the composition, of 70% to 98%, for example of 80 % to 95%, in particular from 85% to 95%, in particular from 87% to 93%.

A first type of composition according to the invention (composition type 1) comprises:

(a) a pheromone (a) consisting of a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0.1:0, 5:3:5 by weight; And

(b) a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3-dimethyl-5-ethylpyrazine), and mixtures thereof.

Such a composition advantageously comprises, in particular consists of:

(a) 6.0% to 12.0%, in particular approximately 10.0%, by weight relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, capric acid , lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0.1:0.5:3:5 by weight;

(b) 100 ppm to 5000 ppm, in particular from 500 ppm to 2000 ppm, for example at approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2- phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl -2,5- dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3-dimethyl-5-ethylpyrazine) and mixtures thereof; And

(c) one or more solvents as defined above, in particular chosen from water, ethanol, isopropanol, and mixtures thereof, in particular at a content by weight, relative to the total weight of the composition, from 85% to 95%, in particular from 87% to 93%, in particular from approximately 90%.

A second type of composition according to the invention (type 2 composition) comprises:

(a) a pheromone (a) consisting of a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0.1:0, 5:3:5 by weight; And

(b) a component (b) chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof. Such a composition advantageously comprises, in particular consists of:

(a) 6.0% to 12.0%, in particular approximately 10.0%, by weight relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, capric acid , lauric acid, ethyl palmitate and ethyl oleate, preferably in proportions of approximately 1:1:0.1:0.5:3:5 by weight;

(b) 0.001 ppm to 50 ppm, in particular from 0.005 ppm to 10 ppm, more particularly from 0.05 ppm to 5 ppm, for example about 1 ppm, relative to the total weight of the composition, of a component ( b) chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline, preferably from 2,5-dihydro- 2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof; And

(c) one or more solvents as defined above, in particular chosen from water, ethanol, isopropanol, and mixtures thereof, in particular at a content by weight, relative to the total weight of the composition, from 85% to 95%, in particular from 87% to 93%, in particular from approximately 90%.

A third type of composition according to the invention (composition type 3) comprises:

(a) a pheromone (a) consisting of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, oleate ethyl, and ethyl linoleate, preferably in proportions of approximately 1:2:8:6:20:20:20 by weight; And (b) a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, there

2.3.5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3-dimethyl-5-ethylpyrazine) and mixtures thereof.

Such a composition advantageously comprises, in particular consists of:

(a) 6.0% to 12.0%, in particular about 10.0%, by weight relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid , ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate, preferably in proportions of approximately 1:2:8:6:20 :20:20 by weight;

(b) 100 ppm to 5000 ppm, in particular from 500 ppm to 2000 ppm, for example at approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 (Ci-Cô)alkyl groups (such as

2.5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3-dimethyl-5-ethylpyrazine) and their mixtures; And

(c) one or more solvents as defined above, in particular chosen from water, ethanol, isopropanol, and mixtures thereof, in particular at a content by weight, relative to the total weight of the composition, from 85% to 95%, in particular from 87% to 93%, in particular from approximately 90%.

A fourth type of composition according to the invention (composition type 4) comprises:

(a) a pheromone (a) consisting of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, oleate ethyl, and ethyl linoleate, preferably in proportions of approximately 1:2:8:6:20:20:20 by weight; And

(b) a component (b) selected from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline.

Such a composition advantageously comprises, in particular consists of:

(a) 6.0% to 12.0%, in particular about 10.0%, by weight relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid , ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate, preferably in proportions of approximately 1:2:8:6:20 :20:20 by weight;

(b) 0.001 ppm to 50 ppm, in particular from 0.005 ppm to 10 ppm, more particularly from 0.05 ppm to 5 ppm, for example about 1 ppm, relative to the total weight of the composition, of a component ( b) chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline, preferably from 2,5-dihydro- 2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof; And (c) one or more solvents as defined above, in particular chosen from water, ethanol, isopropanol, and mixtures thereof, in particular at a content by weight, relative to the total weight of the composition, from 85% to 95%, in particular from 87% to 93%, in particular from approximately 90%.

Impregnated item

The present invention also relates to an article impregnated with a composition according to the invention, as defined above.

The item can be any item that can be placed in the space or on the object to be protected against rodents. It can be made of any material, and in particular can include a thermoplastic polymer such as PVC or a biodegradable material, ideally of natural origin, such as wood or paper. Ideally, the material allows the absorption of the composition according to the invention and then its release over time.

The article could in particular be a molded object, granules (for example made of thermoplastic material), a self-adhesive label (for example whose external surface will be made of thermoplastic material such as PVC)...

Such an impregnated article can be prepared by a preparation process comprising the impregnation of the article in question with a composition according to the invention as defined above, and more particularly a composition according to the invention comprising one or more solvents , namely a composition comprising the pheromone (a), the component (b) and one or more solvents. Thus, the composition according to the invention will preferably be in liquid form to facilitate impregnation. The impregnation can be carried out for example by spraying, by brushing or rolling, or by dipping, preferably by spraying.

Once the article is impregnated with the composition according to the invention, the solvent(s) will evaporate, so that the article will be impregnated only with the pheromone (a) and component (b).

Application in the fight against rodents

The composition according to the invention or the impregnated article according to the invention is intended to be used to combat rodents, and in particular against rats and/or mice, possibly in association with other systems for combating rodents. rodents such as ultrasonic emission systems.

In particular, the compositions according to the invention or the articles impregnated according to the invention can be used in a method of combating rodents comprising: (1) the application of a composition Ci according to the invention or the deposit of an article impregnated with a composition Ci according to the invention in a space or on an object to be protected against rodents; And

(2) optionally repeating step (1) one or more times, within 1 to 90 days, preferably 7 to 35 days, after the previous step.

According to a first embodiment according to the invention, the method comprises:

(1) the application of a composition Ci according to the invention in a space or on an object to be protected against rodents; And

(2) optionally repeating step (1) one or more times, within 1 to 90 days, preferably 7 to 35 days, after the previous step.

According to a second embodiment according to the invention, the method comprises:

(1) depositing an article impregnated with a composition Ci according to the invention in a space or on an object to be protected against rodents; And

(2) optionally repeating step (1) one or more times, within 1 to 90 days, preferably 7 to 35 days, after the previous step.

The objects to be protected can be, for example, electrical wires, thermal insulators, stored foodstuffs (e.g. bags of grain, bags of flour, crates of fresh or dried fruit), etc.

The spaces to be protected can be, for example, living or storage spaces, such as sheds, barns, grain silos, electrical rooms, attics, living rooms, cellars, etc.

Advantageously, step (1) is repeated several times and therefore step (2) is implemented. The time between two applications of a composition according to the invention or deposits of an article impregnated with a composition according to the invention is not necessarily always the same and could be chosen for example according to the volatility of the last composition according to the invention used, this period will however remain from 1 to 90 days, preferably from 7 to 35 days, after the last application of a composition according to the invention or deposit of an article impregnated with a composition according to the invention.

When implemented, step (2) may for example comprise N-1 reiteration(s) each carried out independently with a composition Ci according to the invention or an article impregnated with a composition Cj according to invention, the pheromonal mixture consisting of the pheromone (a) and component (b) of each of the compositions Ci to CN being different from one composition to another, that is to say that the pheromonal mixtures are different in nature for each of the compositions, they are made up of different compounds. The use of Ci to CN compositions comprising different pheromonal mixtures makes it possible to simulate successively different types of pheromones belonging in particular to different types of predators of rodents, such as felines (eg cat), canids (eg dog, fox or wolf), snakes, or mustelids and/or representing an alarm pheromone for the rodent . This makes it possible to avoid any phenomenon of habituation of rodents and therefore to maintain the effectiveness of the method over time.

According to a particular embodiment, N is an integer from 2 to 12, in particular from 2 to 8, preferably from 2 to 5, for example from 4,

According to a particular embodiment of the invention, at least one of the compositions Ci to CN comprises a component (b) chosen from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and their mixtures, such as a type 2 or 4 composition as defined above.

According to another particular embodiment of the invention, at least one of the compositions Ci to CN comprises a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 groups (Ci- Cô)alkyl (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2 ,3-dimethyl-5-ethylpyrazine) and mixtures thereof, and preferably is a composition of type 1 or 3 as defined above.

According to another particular embodiment of the invention, at least one of the compositions Ci to CN comprises a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 groups (Ci- Cô)alkyl (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2 ,3-dimethyl-5-ethylpyrazine) and their mixtures, and preferably is a composition of type 1 or 3 as defined above; and at least one other of the compositions Ci to CN comprises a component (b) chosen from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec- butyl-thiazoline, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof, such as a composition of type 2 or 4 as defined above.

According to yet another particular embodiment of the invention, N is equal to 4 and the compositions Ci to C4 are different from each other and are respectively a composition of type 1, a composition of type 2, a composition of type 3 , and a type 4 composition as defined above.

Steps (1) and (2) of the method according to the invention can also be repeated one or more times. Thus, cycles using different compositions according to the invention can be carried out several times successively. For example, when N = 4, compositions according to the invention Ci to C4 different from each other could be used successively and according to several cycles, for example as follows: Ci, then C?, then C3, then C4, then Ci , then C?, then C3, then C4, then Ci, then C?, then C3, then C4...

Kit

The present invention also relates to a kit comprising:

- at least two, in particular N (with N as defined above), pheromonal compositions according to the invention as defined above, the pheromonal mixture consisting of the pheromone (a) and component (b) of each of the compositions of the kit being different from one composition to another (i.e. it is made up of different compounds), or

- several impregnated articles as defined above, at least two articles, in particular N (with N as defined above), being impregnated with a pheromonal mixture, consisting of the pheromone (a) and the component (b), different from one article to another.

According to a particular embodiment of the invention, at least one of the pheromonal mixtures comprises a component (b) chosen from 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4 ,5-dihydro-2-sec-butyl-thiazoline, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof, such as a type 2 or 4 composition as defined above.

According to another particular embodiment of the invention, at least one of the pheromonal mixtures comprises a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 groups (Ci-Cô) alkyl (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3 -dimethyl-5-ethylpyrazine) and their mixtures, and preferably is a composition of type 1 or 3 as defined above.

According to another particular embodiment of the invention, at least one of the pheromonal mixtures comprises a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 groups (Ci-Cô) alkyl (such as 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, or 2,3 -dimethyl-5-ethylpyrazine) and their mixtures, and preferably is a composition of type 1 or 3 as defined above; and at least one other of the pheromonal mixtures comprises component (b) selected from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl- thiazoline, preferably from 2,5-dihydro-2,4,5-trimethylthiazoline, 4,5-dihydro-2-sec-butyl-thiazoline, and mixtures thereof, such as a composition of type 2 or 4 such as defined above. According to yet another particular embodiment of the invention, N is equal to 4 and the 4 compositions of the kit are respectively a type 1 composition, a type 2 composition, a type 3 composition, and a type 4 composition. as defined above or the 4 different impregnated articles are impregnated respectively with a composition of type 1, a composition of type 2, a composition of type 3, and a composition of type 4 as defined above.

The compositions of the kit will preferably be contained in a container allowing them to be sprayed. They can also be contained in a container equipped with a drip system or a brush. They will therefore preferably be in liquid form.

EXAMPLES

The raw materials used for these examples come from Sigma Aldrich.

The analysis of pheromone contents is carried out by gas chromatography (CPG) with a flame ionization detector on an Agilent - HP series II 5890 device.

Attractant release studies are carried out in ventilated ovens without windows so as not to be exposed to light radiation. These studies are carried out using two methods, either by monitoring the weight loss of the samples, or by monitoring the residual concentration of the pheromone in the sample by CPG.

Example 1: Formulation 1

In a 2 L jacketed reactor, the following are introduced at 50°C with stirring:

800.0 g of isopropanol,

6.5 g of dimethyl azelate,

6.2 g of dimethyl pimelate,

0.5 g of capric acid,

3.7 g of lauric acid,

16.1 g of ethyl palmitate, and

67.0 g of ethyl oleate.

The mixture is left stirring for 15 minutes then 100 g of an isopropanol solution containing 1 g of 2,5-dimethylpyrazine are added.

The final mixture is left stirring for 15 minutes and then allowed to cool to room temperature.

The solution has no unpleasant odor. It reconstitutes a mixture of the cat's facial pheromone (marking of living space) and the cat's urine marking (marking of hunting territory). Example 2: Formulation 2

In a 2 L jacketed reactor, the following are introduced at 50°C with stirring:

800.0 g of isopropanol,

6.5 g of dimethyl azelate,

6.2 g of dimethyl pimelate,

0.5 g of capric acid,

3.7 g of lauric acid,

16.1 g of ethyl palmitate, and

67.0 g of ethyl oleate.

Furthermore, 0.1 g of 2-(sec-butyl)-4,5-dihydro-thiazoline are prepared in 1000 g of isopropanol.

We then take 10 g of this solution which we add to the reactor.

90 g of isopropanol are then added to the reactor. The final mixture is left stirring for 15 minutes and then allowed to cool to room temperature.

The solution has no unpleasant odor. This mixture reconstitutes the cat's territorial marking pheromone and combines it with the alarm pheromone of mice and rats.

Example 3: Formulation 3

In a 2 L jacketed reactor, the following are introduced at 50°C with stirring:

800.0 g of isopropanol,

0.6 g of capric acid,

1.2 g of lauric acid,

4.2 g of ethyl myristate

3.6 g of ethyl pentadecanoate,

30.1 g of ethyl palmitate,

30.1 g of ethyl oleate, and

30.1 g of ethyl linoleate.

The mixture is left stirring for 15 minutes then 100.0 g of an isopropanolic solution containing 0.545 g of 2,6-dimethylpyrazine, 0.182 g of 2,3,5-trimethylpyrazine and 0.273 g of 3-ethyl-2 are added. ,5-dimethylpyrazine.

This mixture simulates the habitat marking pheromone of canine species (wolf or dog), and the urine marking of these animals. Despite the characteristic unpleasant odor of the pyrazine derivatives used, the formulation does not give off any unpleasant odor.

Example 4: Formulation 4

In a 2 L jacketed reactor, the following are introduced at 50°C with stirring: 800.0 g of isopropanol, 0.6 g of capric acid, 1.2 g of lauric acid,

4.2 g of ethyl myristate,

3.6 g of ethyl pentadecanoate,

30.1 g of ethyl palmitate,

30.1 g of ethyl oleate, and

30.1 g of ethyl linoleate.

The mixture is left stirring for 15 minutes.

Furthermore, 0.1 g of 4,5-dihydro-2,4,5-trimethylthiazoline are prepared in 1000 g of isopropanol. We then take 10g of this solution which we add to the reactor.

90 g of isopropanol are then added to the reactor. The final mixture is left stirring for 15 minutes and then allowed to cool to room temperature.

The solution has no unpleasant odor. This mixture reconstitutes the territorial marking pheromone associated with the habitat pheromone of canines and the hunting territory marking pheromone of foxes. The content of the latter (4,5-dihydro-2,4,5-trimethylthiazoline) is 10ppm.

Example 5: Repellent effect of formulations 1, 2, 3, 4 with 1 week interval

Amber spray bottles of 20 mL of each of the formulations prepared according to Examples 1 to 4 are prepared. The pumps deliver 100 µL of formulation by pressing on the pump. A barn on a farm containing bales of straw, seeds and agricultural tools is used to set up the alternating olfactory simulation (SOA) with the formulations of examples 1 to 4. The dimensions of the barn are 20 m wide , 50 m long and between 3 and 7 m high.

We place 5 mechanical mouse traps equipped with non-toxic bait from the “super cat” brand from the company Swiss Inno, distributing them along the walls or in the middle of the barn.

The 5 traps are left for 4 weeks and are removed every week and reloaded if they have caught a mouse or rat. This allows you to obtain a reference average of trapping of the traps in this barn.

At the start of week 5, self-adhesive PVC labels measuring 10 cm x 10 cm are placed every 10 m on the interior walls. A spray of formulation 1 is applied to each label.

At the start of the following week (week 6), we identify the traps and apply 1 spray of the formulation of example 2 on the labels. We proceed in this way for the following two weeks, first using formulation 3, then formulation 4.

The mouse trapping results are shown in Table 1 below. [Table 1]

During the first four control weeks, 2 mice are captured on average per week for 5 traps, or 0.4 mice/trap/week. During the following four weeks, in the presence of the four formulations according to Examples 1 to 4, there was an average of 0.25 mice captured per week for 5 traps. The SOA treatment therefore well protected the barn against the installation or circulation of mice.

Example 6: Spacing of treatments carried out in example 5

The experiment of example 5 is continued by applying at the start of week 9 the formulation of example 1, then at the start of week 11 the formulation of example 2, then at the start of week 13 the formulation of example 3 and at the start of week 15 that of example 4. We continue monitoring the traps every week until week 16.

The results obtained are presented in the following Table 2.

[Table 2]

There were therefore 2 mice trapped over the entire test period, which amounts to 0.05 mice trapped per week per trap, or 87.5% less than during the control period. This example demonstrates that SOA can work with a spacing between treatments of 15 days.

Example 7: Estimating the duration between 2 SOA applications

On 10 labels as used in Example 5, 4 sprays of formulation 1 are applied. These labels are placed in a ventilated oven at 30° C. 2 labels are taken each week. Each label is rinsed 3 times with 10 mL of methyl-ter-butyl-ether. The rinse solutions are combined and the quantity of cat pheromone components remaining on the label is measured by GC.

The residual amounts of these components compared to their initial dose are presented in Table 3 below. [Table 3]

This example demonstrates that after 5 weeks at 30°C, at least 20% of all the components of the initial formulation remain.

Claims

CLAIMS Pheromonal composition comprising: (a) 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, acid capric acid, lauric acid, ethyl palmitate and ethyl oleate; Or 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate; (b) 100 ppm to 5000 ppm, in particular 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and mixtures thereof; Or 0.001 ppm to 50 ppm, in particular 0.005 ppm to 10 ppm, more particularly 0.05 ppm to 5 ppm, for example approximately 1 ppm, relative to the total weight of the composition, of a component (b) chosen from 2 -propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline; And (c) optionally one or more solvents. Composition according to claim 1, comprising 85% to 95%, in particular from 87% to 93% by weight, relative to the total weight of the composition, of component (c). Composition according to claim 1 or 2, in which component (c) is chosen from water, methanol, ethanol, n-propanol, isopropanol, glycerol, 1,2-propanediol, 1 ,3-propanediol, and their mixtures, in particular chosen from water, ethanol, isopropanol, and their mixtures. Composition according to any one of claims 1 to 3, in which the pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups are chosen from 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine, and mixtures thereof. Composition according to any one of claims 1 to 4, wherein component (a) is a mixture of dimethyl azelate, dimethyl pimelate, capric acid, lauric acid, ethyl palmitate and ethyl oleate in the proportions 1:1:0.1:0.5:3:5 by weight; or a mixture of capric acid, ethyl laurate or lauric acid, myristate ethyl, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate in the proportions 1:2:8:6:20:20:20 by weight. Composition according to any one of claims 1 to 5, comprising: (a) 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, acid capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in the proportions 1:1:0.1:0.5:3:5 by weight; (b) 100 ppm to 5000 ppm, in particular 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted with 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and their mixtures, in particular chosen from 2-phenylethylamine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine, and mixtures thereof; And (c) one or more solvents, in particular chosen from water, ethanol, isopropanol, and mixtures thereof. Composition according to any one of claims 1 to 5, comprising: (a) 6.0% to 12.0%, in particular approximately 10.0%, by weight, relative to the total weight of the composition, of a mixture of dimethyl azelate, dimethyl pimelate, acid capric acid, lauric acid, ethyl palmitate and ethyl oleate, preferably in the proportions 1:1:0.1:0.5:3:5 by weight; (b) 0.001 ppm to 50 ppm, in particular 0.005 ppm to 10 ppm, more particularly 0.05 ppm to 5 ppm, for example approximately 1 ppm, relative to the total weight of the composition, of a chosen component (b) among them 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline; And (c) one or more solvents, in particular chosen from water, ethanol, isopropanol, and mixtures thereof. Composition according to any one of claims 1 to 5, comprising: (a) 6.0% to 12.0%, in particular about 10.0%, by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or acid lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate, preferably in the proportions 1:2:8:6:20:20:20 by weight; (b) 100 ppm to 5000 ppm, in particular 500 ppm to 2000 ppm, for example approximately 1000 ppm, relative to the total weight of the composition, of a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 groups (Ci-Cô)alkyl, and their mixtures, in particular chosen from 2-phenylethylamine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5 - dimethylpyrazine, 2,3-dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine, and their mixtures; And (c) one or more solvents, in particular chosen from water, ethanol, isopropanol, and mixtures thereof. 9. Composition according to any one of claims 1 to 5, comprising: (a) 6.0% to 12.0%, in particular about 10.0%, by weight, relative to the total weight of the composition, of a mixture of capric acid, ethyl laurate or acid lauric acid, ethyl myristate, ethyl pentadecanoate, ethyl palmitate, ethyl oleate, and ethyl linoleate, preferably in the proportions 1:2:8:6:20:20:20 by weight; (b) 0.001 ppm to 50 ppm, in particular 0.005 ppm to 10 ppm, more particularly 0.05 ppm to 5 ppm, for example approximately 1 ppm, relative to the total weight of the composition, of a chosen component (b) including 2-propylthiazoline, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2-sec-butyl-thiazoline. (c) one or more solvents, in particular chosen from water, ethanol, isopropanol, and mixtures thereof. 10. Article impregnated with a composition according to any one of claims 1 to 9. 11. Process for preparing an impregnated article according to claim 10 comprising impregnating the article with a composition according to any one of claims 1 to 9, preferably comprising one or more solvents. 12. Use of a composition according to any one of claims 1 to 9 or of an impregnated article according to claim 10, to combat rodents. 13. Rodent control method including: (1) the application of a composition Ci according to any one of claims 1 to 9 or the deposition of an article impregnated with a composition Ci according to any one of claims 1 to 9 in a space or on an object to protect against rodents; And (2) optionally repeating step (1) one or more times, within 1 to 90 days, preferably 7 to 35 days, after the previous step. 14. Method according to claim 13, in which step (2) is implemented and comprises N-1 reiteration(s) each carried out independently with a composition Ci according to any one of claims 1 to 9 or an article impregnated with a composition Cj according to any one of claims 1 to 9, preferably with N being an integer from 2 to 12, in particular from 2 to 8, preferably from 2 to 5, for example from 4, the pheromonal mixture consisting of the pheromone (a) and component (b) of each of the compositions Ci to CN being different from one composition to another. Method according to claim 14, in which at least one of the compositions Ci to CN comprises a component (b) chosen from 2-phenylethylamine, pyrazines substituted by 1, 2, 3 or 4 (Ci-Cô)alkyl groups, and their mixtures, in particular chosen from 2-phenylethylamine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3,5-trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2,3 -dimethylpyrazine, 2,3-dimethyl-5-ethylpyrazine, and mixtures thereof, and preferably is a composition according to claim 6 or 8; and in which at least one other of compositions Ci to CN comprises a component (b) chosen from 2-propylthietane, 2,5-dihydro-2,4,5-trimethylthiazoline, and 4,5-dihydro-2- sec-butyl-thiazoline, and preferably is a composition according to claim 7 or 9. Method according to claim 14 or 15, in which N is equal to 4, the compositions Ci to C4 are different from each other and are respectively a composition according to claim 6, a composition according to claim 7, a composition according to claim 8, and a composition according to claim 9. Method according to any one of claims 13 to 15, in which steps (1) and (2 ) are repeated one or more times. Kit including: - at least two compositions according to any one of claims 1 to 9, the pheromonal mixture consisting of the pheromone (a) and component (b) of each of the compositions being different from one composition to the other, or - several articles impregnated according to claim 10, at least two articles being impregnated with a pheromonal mixture, consisting of the pheromone (a) and component (b), different from one article to another.